Method

First using a potato peeler, peel the zest off the 6 lemons. Try not to take too much pith (white flesh) as this can make the drink bitter

Once the zesting is done, juice the lemons

Add the sugar into a sterilised Kilner jar or large pitcher

Pour in the lemon juice and zest and a little bit of the boiled water and stir the sugar until it dissolves

Add the rest of the water and let cool on the side before going into the fridge

It's best left for 24 hours but even left overnight in the fridge still gives a nice refreshing glass

Depending on how 'unclouded' you want the drink, pass it through a sieve if not an issue or pass through a sieve and coffee filter it is an issue

Serve chilled with a slice of lemon and ice